Seiko Cal. 6646 - 416

The Seiko 6646-416 represents an important milestone in Seiko's 1977 lineup. With its 18mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-d0a354683cf2]

Also known as: Turtle, Navigator

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1977

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